Unify internal/external TLS protocol version enums

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
diff --git a/ChangeLog.d/mbedtls_tlsver_enum.txt b/ChangeLog.d/mbedtls_tlsver_enum.txt
new file mode 100644
index 0000000..b6f6357
--- /dev/null
+++ b/ChangeLog.d/mbedtls_tlsver_enum.txt
@@ -0,0 +1,2 @@
+Features
+   * Unify internal/external TLS protocol version enums